Holmes and Watson investigate when an influential cancer researcher is murdered on "Elementary" at 10 p.m. EDT tonight on CBS.

Worst of the day

General Motors was aware of a faulty ignition switch as early as 2001 — three years later than it has previously admitted. The scope of the problem is still not completely clear, but GM has expanded the recall to 1.6 million vehicles, including Chevrolet Cobalt, Pontiac G5, Saturn Ion, Chevrolet HHR, Pontiac Solstice and Saturn Sky.